Damper



Aug 31, 1943` A. J. FlLKlNs 2,328,332

DAMPER Filed March 27, 1940 sym# WMM ATTORNEY.

Piemontesi, 1943 2,328,332,

p' zis2ss2- fr 5.1 jAM1P1i1ft.-` 1 Arthur J; Filkns,` Chicago', Il'll, 4lassi'gnorto Paul Dickinson, Inc., ,(lhicsllLgQ,` -Ill`., `a corporation. of vluinois, p

'Application March 27, 1949... serial `'trance6,227. t 4 claims. (o1- 9s-85)` Q This invention "relates injgeneral tofadamper "Attaehedqto the `.inside of the `pipe by-rivetss for. pipes and passages and is more particularly or other suitable `fastening devices is aA ratchet described` as a pipe damper for a roof ventilator. plate Il). the edges ll of which are turned: at right Anfimportant object of the invention `is in the anglesto `the plate for. providing additional rigidprovision of a damper which may be accurately ,5 ity. This plate extends at rightanglesn tothe controlled, regulatedand `held in-"anyfadjusted`` shaft `tand the innerffreeend ofthe plateis position.V f over the center ofthe pipeor overthe center of "Afurtherobjectoftheinventionfisinthe pro- `the shaftiorming a1 curved quadrant having visonofa damper providdwith alquicklyfand ratchet teetnllZ in" the` edgethereof withr the easily operated ratchet mechanism" foi-.opening lo `shaft `li` aslthe" center of curvature.` l At the upper and closing the damper.` l y. l end'of the tooth portion is astop i3 and atthe A further object offthe invention is in' thepro- 4bottom of the tooth portion, isla stop I4. for envision of a oounterbalance damper fwhichis 'eas- `gaging and limiting the movement of.` the damper ily `operated by directly attachedcorda xthe `deplate in both directions.

pending ends of whichaie located relatiyely close 15 The teeth of the ratchet Plate l0 `alte disposed .togetherso thatthey will indicate` at Ya glancethe downwardly in the `quadrant; and at the'adjac'ent relativeamount .the damper is opener-closed. nedge of the; damper `plate isa latch" laslidably Other and furtherobjects of the inyention will mountedfin,a-fcasing I i` attached to` the under i amiear'` hereinafter,` a y preferred embodiment of g ,ofthe `plate1andhaving a'stem |.;1 extenddrawing in which the invention being shown in the accompanying `#2 0 ingfthroiigh; andz out ojf, the (casingl at thefside y opposite the edge fof the plate; Within the cas- Figure 1 is a top View showing a ventilator of ing `and surrounding the stem is a spring `I8 this type attached toa square pipe and in closed tending to force the latch outwardly and into position; engagement with the teeth I2, the` spring pererating means.

Figure 2 is a sectional elevationtaken onthe 25 mitting the latch and the plate to move in one line 2"-2 of Figure 1; f l direction but engaging the teeth in the other di- Figure 3 is a sectional detail illustrating a lockl rection of movement. Attached to the stem outing latch; and l p j side of the casing is a collar I9 to limit the move- Figure ishows a modification of the iatch op" ment of the Ieteh as urged by the spring I8 and y Si) 'attached to the outer end of the stem is a pull n is often desirable tcresuiatc 4the action of` oord 20- This P1111 @0rd extends beyond the Cenroof ventilators, particularly during cold Weather fte? f the plate and under a fastening Clip 2| With or during high Windzvelocities and atjvarous the extremity of the cord depending below the other times for maintaining desired heat and ai;` ventilator pipe where itis accessible. Attached mosphercconditions within a building. Thisin- 35 `to a clip 22 at the other side of the Plate nearer vention proposes a counterweighted damperpref; y the latch is a closing cord 23 and the extremities erably located in the throat of a vent1ator,hav of these cords are disposed Close together so that ing a ratchet attachment operated by centrally they Caribe easily engaged and manipulated by located cords which are easily and quickly ma-` an Operatornipulated to regulate the position of the damper. 40 f One ofthe cords 23 is the closing Cord having Referring now more particularly to the draw-v a Suitable designation 24 at the lower end and ing, a square ventilator pipe is shown to which the other is the opening oord having a knob or this damper is applied by means of a transverse suitable designation` at the lower end thereof.`.

`shaft 6 extending between opposite walls there- If desired 2' marker 25 may be placed 0n one 0f of, but a similar construction may be appned to the cords at adistance from the extremity there-` round pipes or passages of various shapes, it be- 0f` t0 Sll-OW the relative aHlOllnt that` the damper! ing necessary only to shape the damper accordiS Opened- FOI1 example, When the damper is eningly. tirely closed as shown in Figure 2, the markers l Rotatabiymounted or with the Shaft; `5 ig a 24 and 25er the extremities of the cords vwould damper plate 'l having attaching straps or pivot- 50 be at the same heighth and when the opening `ingnps, a for mounting it Qn the shaft, l Thel cord is pulled to open the draft to the pullest size and shape. of the plate depends upon the` extent the markers 24 and 26 would be at the `shape and size of the ventilator pipe, the plate `same heighth- In an intermediate position the being adapted .to substantially close the pipe marker 24 is intermediate the markers 25 and`26.

. when it is disposed in transverse position therein. In Order to insure thatthe damper will be held against the teeth l2 and the stop i3 a counterthe damper, pulling on the cord 20 first with-y* draws the latch from engagement with the teeth n Y l Ying a depending cord secured at one end to the against its spring I8 whereupon the plates may be rotated, and by manipulating both cords at the same time the damper plate can beset in any inclined position.

- A modification of the latch operating means is shown in Fig. 4, which comprises a link 3l! plv'AY oted at one end to the stem Il ofr the latch I6 and pivoted at the other end intermediate the ends of a lever 3l. This lever is pivoted'at its upper end to the under side of the damper plate 'I and has a pull cord 32 attached to its outer or free end. The latch spring tends to pull the lever up, and pulling on the cord 32 withdraws the latch for moving lthe plate 'as desired.`

While it is intended thattlns damper is prefv erably located in the throat of a ventilator just above a ceiling line 28, it is apparent that the damper may be variously placed wherever desired land although particularly intended for a vertical the central pivot with the edge of the plate in a curved path having teeth to engage the latch in its upward direction of movement and having end projections to limit the movement of the damper plate to ninety degrees, and means for withdrawing the latch from the teeth and rotating the damper plate in either direction.

' 2. vA damper comprising a plate centrally pivoted, a spring latch projecting at one end of the plate, a segment with one edge having teeth in .fa curved path to engage the latch as the plate is rotated,l and means to rotate the plate comprislatch extending beyond the pivot and having a clip atthe sameside of the plate through which it is movable, anda second depending cord secured to theplate between the latchjand its pivot.

` 3. In a damper comprising a plate centrally pivoted with a spring latch projecting from one edge, a segment with teeth to engage the latch in a curved path with means at the ends to limit the movement of the plate to an langle of ninety degrees, and means attached to the latch and plate and depending at opposite sides oi the'pivot for controlling the rotation and positioning of the plate.

4. A damper comprising a centrally pivoted plate, having a spring pressed` latch projecting at vone edge, a ratchet plate having teeth in a curved path at right angles to the damper plate,

f means on the ratchet plate at the ends ofthe path to engage yand limit the movement of the damper plate to ninety degrees, and exible means attached to the" latch and pivoted plate and depending from opposite sides of the pivot for rotating and positioning the plate in the ratchet plate.

` ARTHUR J. FILKINS. 

